Combined keyboard tape transmitter



March 31, 1942. R. A. LAKE I COMBINED KEYBOARD TAPE TRANSMITTER Fi1ed Nov. 9, 1939 s Sheets-Sheet 1 INVENTOR R055 A. LAKE ATT RNEY- FIG. 1

March 31; 1942. r

R. A. LAKE COMBINED KEYBOARD TAPE TRANSMTTTER 5 Sheets-Sheet 2 Filed Nov. 9, 1939 FIG.2

IHI

INVENTOR Ross A. LAKE ATTO NEY March 31, 1942. R. A. LAKE 2,277,706

COMBINED-KEYBOARD TAPE TRANSMITTER Filed Nov. 9, 1959 3 Sheets-Sheet 3 m o h. n Y RA 0L T R NA 0 F- VS "H m A 8 nu 38 2 m .w. 02 O- n2 3 2 V a 2 .5. mm. N... N B no w 3. DO 00 Vm m m 9 o 3 cm 0 3 t. 3. 3. 3 in. 2.. 2. .m. 2. mm. 3. v S 2. a. 3 8 9 v Q... um mo. .8. .6 2.. 6. no. 2.. 3 cm. 2.. mm. wt 2V3 M n L C a 553. N. O. m

Patented Mar. 31, 1942 COMBINED KEYBOARD TAPE TRANSMITTER Ross A. Lake, Oak Park, Ill., assignor to Teletype Crporation, Chicago, 111., a corporation of Delaware Application November 9, 1939, Serial No. 303,516 18 Claims. (01. 178-47) This invention relates to telegraph transmitters and more particularly to telegraph transmitters controlled either from a manually operated keyboard or signal control indicia included in a strip.

An object of the invention is the provision of an extremely simple and very compact appara tus for transmission of signals either from a keyboard or a control strip.

A feature of the invention is the provision of mechanism for precluding operation of the keyboard during transmission from the control strip. Another feature of the invention resides in the assurance that the signal distributor will be ar-' rested at the end of a signal cycle preparatory to conditioning the apparatus for keyboard operation.

A still further feature of the invention is an arrangement wherein insertion of. the control strip for transmission may be accomplished quickly and accurately,

Another feature of the invention is the pro-j vision of a guide which is fixed and-which is tape.

A still further feature of the invention resides in the manual advancement of the perforated tape during which transmission is precluded.

The above and other objects and features of the invention are attained by the provision of a transmitting cam drum released cyclically for keyboard transmission and operated continuously for strip or tape transmission for opera'ting successively a plurality of contact control levers, as determined either by the setting of code bars through the depression of key levers or by elements positioned in accordance With the signal perforations or indicia in the strip or tape, depending upon whether the apparatus is conditioned for keyboard or'tape transmission. Conditioning the apparatus for keyboard or tape transmission is established by mechanism hav ing two operative positions. In one of such positions the keyboard is free to be operated and the elements positioned in accordance with a signal perforation or indicia are rendered inef-' A further feature of the invention is an arrangement controlling manually the transmission of single or multiple characters from a perforated fective, while in the other of its positions, the keyboard is blocked against operation and the specified elements are allowed to assume positions to control the position of contact control levers by the signal perforations or indicia to control efiectively the signal impulses transmitted to the line conductor with which the apparatus may be connected.

Specifically, conditioning the apparatus for keyboard or tape operation is controlled by a system of levers. When in oneposition, opera-- tion of the key levers is prevented and when in another position, the elements'responsive to the tape perforations are moved free oi-the contact control levers and the mechanism for advancing the tape step by step is rendered inert. In addition, forthe respective positions, the transmitting cam drum will rotate either intermittently or continuously. When in the keyboard position, tape operation cannot be resumed until the key levers are blocked and the transmitting cam drum stop mechanism is in a position for arresting the transmitting cam drum at the completion of its cycle of rotation. The transmitting cam drum may thereafter be released for continuous rotation to effect transmission of signal impulses, as determined by the signal perforations or indicia in the control strip. Arrestment ofthe transmitting cam drum when the mechanism is in the tape transmission position may also be efiected.

Insertion of the perforated tape for transmission therefrom is facilitated by allowing free location of such first row of'perforations is expedited by the provision of a fixed transparent tape guide which enables'the operator to position the'tape quickly for transmission and which has a portion curved to direct the course of the tape.

Step-by-step advancement of the tape normallyis accomplished'from a cam operated in timed relation to the transmission of code signal combinations. Under certain circumstances manual advancement is'preferred, so 'to'perm'it this operation mechanism is arranged to advance the tape step by step independently of the cam provided for that purpose.

When the end of the message will be indicated by an all-spacing signal, the signal distributor should be arrested to discontinue transmission of signals to the line; In the is reached, which present invention arrestment of the distributor is accomplished by the provision of mechanism operated in response to the all-spacing signal to permit the distributor stop lever to move into the path of the stop lug on the distributor and arrest the distributor at the completion of the signal cycle.

A more detailed understanding of the invention may be obtained from the following description, taken in conjunction with the accompanying drawings, wherein Fig. 1 is a plan view of apparatus embody ing the present invention;

Fig. 2 is a partial sectional elevational view of the apparatus shown in Fig. 1;

Fig. 3 is a sectional view taken substantially along the broken line 33 of Fig. 1;

Fig. 4 is an end elevational view partly in section of the apparatus shown in Fig. 1;

Fig. 5 is a view taken substantially on the broken line 5-5 of Fig. 1;

Fig. 6 is a partial sectional view showing certain elements in their respective operating positions; and

Fig. 7 is a circuit diagram showing the electrical connections for the apparatus.

According to its preferred embodiment, the apparatus has a cast metal base or frame |2 provided with a front extension l3. Key levers |4 arranged within the upper portion of the base or frame I2 have their rear ends in engagement with a common pivot rod |5 carried by lugs suitably supported by the base or frame l2. The forward ends of the key levers extend through the slots of a comb bar l6 and are upturned to support keys H. A bail l8 pivoted on the forward extension |3 carries a space bar (not shown). The key levers and the space bar are held in their normal position by suitable springs.

A set of five permutation bars 22, 23, 24, 25, and 26 extend transversely below the key levers, the ends of the bars being guided in slots in oppositely disposed brackets l9 fixed. Within the base l2 and being supported on antifriction rollers 20. In addition to the permutation bars 22 to 26, inclusive, is a bar 2| which has two alternative positions. In one of such positions the key levers M are free to be moved, whereas in its other position movement of the key levers I4 is prevented; that is, bar 2| serves to free or block the movement of key levers |4.

Each permutation bar 22 to 26, inclusive, is free to move longitudinally to either one of two positions and each bar has cam lugs 21 having oppositely inclined faces, one such face being provided on each bar for each of the key levers |4 so that each bar is adapted to be moved to its right-hand position by some of the keys and to its opposite left-hand position by the other keys. Accordingly, the keys act to set the permutation bars 22 to 26, inclusive, in different combinations.

Intermediate the ends of each of the permutaas the associated permutation bar is shifted, .is 75 moved into and out of the position above the end of the horizontal arm of the associated bell crank lever 32. The fingers and the bell crank levers 32 are held in proper position by spacing washers on the pivot shafts 3| and 33, respectively. and preferably also a guide comb bar 39 is provided for the horizontal arms of the bell crank levers 32, as is shown in Fig. 3.

In addition to the bell crank levers 32 there is a sixth bell crank lever 4|] which is not controlled by a selecting finger 30 or one of the permutation bars 2226, but is, as will be explained later, operated invariably for each cycle of operation of the apparatus for transmitting a start impulse.

Each bell crank lever 32, which is equally true of hell crank lever 40, has a hook 4| at its upper end which engages the insulated upper end of a spring contact 42 and each of the latter cooperates with a spring contact 43, the pairs of contact springs being mounted upon but insulated from a supporting bar 36 carried by uprights 34 and 35. Each spring contact 42 tends to engage its associated contact spring 43 and also serves to hold a lug (not shown) on the horizontal portion of each of the bell crank levers 32 in engagement with the surface of a cylindrical cam 44, the latter constituting a part of a sleeve or drum 45 and extending over the horizontal arms of the bell crank levers 32 and 40. The cam drum 45 is provided with a helical series of slots which, as the cam sleeve 45 is rotated, successively pass over the lugs (not shown) on the horizontal arm of the bell crank levers 32 and 49. As the corresponding recess passes over one of the lugs, the associated switch contact spring 42 is allowed to engage its associated contact spring 43 to complete an electrical circuit through the respective contact springs under the control of the corresponding bell crank lever 32.

Cam sleeve 45 is mounted on a shaft 46 which is journ'aled at its rear end in a bearing mounted in bracket 43 and at its forward end in a hearing mounted in the front upright 34. Cam sleeve 45 is mounted loosely on shaft 46; that shaft 46 may be rotated continuously while cam sleeve 45 is being held against rotation.

The cam sleeve 45 has secured to it a collar 49, a portion'of which is serrated and is normally urged along the shaft 46 to the right, as viewed in Fig. 4, by the action of a spring 59. Secured to the shaft 46 and arranged to cooperate with collar 49 is a correspondingly machined collar 5|. Shaft 46 is connected to a source of driving power through a gear 52 in such a manner that it is driven continuously, but due to the arrangement of collars 49 and 5|, which constitute a clutch between shaft 46 and cam sleeve 45, the latter maybe selectively rotated.

Spring 50, as previously described, tends to move collar 49 along shaft 46 and into engagement, with collar 5|, but this action of spring is normally prevented, by means of a pivoted arm 53, Fig, 4, which has a portion thereof spring-urged into the path of a shoulder 54 formed on collar 49. Shoulder 54 is also formed with a gradual cam surface so that as the collar 49 rotates, it will cooperate with the associated portion of the stop arm 53 and cause the collar 49 to be moved along the shaft 46 against the action of spring 56 to disengage the serrated portions of the collars 49 and 5| and stop collar 49 with its associated cam sleeve 45.

Arm 53 has a horizontal portion 55 which is operatively' associated with one arm of a T-shaped lever 56, the depending'arm of which is pointed and is in the path of a shoulder 51 formed in a'member 58, Fig. 4. Thelmemb'er 58 is secured toa'universal bail 59 which is rotatably mounted :on studs 6|] suitably secured to brackets in base I 2. which is fastened to member 58i'and" the other end secured to 'a fixed sprin'g "postgurges the member 58 to the position shown in Fig.4, or a position in alignment with the Idepending arm of T-lever56.';

When the universal bail 59 is operated, which will occur upon the depressionofany of the key levers 4, member 58 will. be moved to the left, as viewed in Fig. 4, against the action of its spring andthe shoulder 5! will engage the pointed end of the T'shaped lever 56 and cause stop arm 53 to be moved through the depression of portion 55, out of engagement with shoulder 54 of collar49. Under these conditions,

spring 50 urges collar 49 tothe right, as viewed" in Fig. 4, and the serrated portions of the 'collars 49 and 5| are brought into engagement and power from shaft 46 is communicated thereto to rotate cam sleeve or drum 45 with its cams 44. When the cam sleeve or drum 45 approaches the end of its cycle of rotation, the cam surface preceding" the shoulder 54 is effective upon stop arm '53, which has, upon the restoration of bail 59, returned by the action of its spring to the-position shown in Fig. 4, to move collar 49 against the action of spring 50 and effect the disengagement of the serrated portion of 'collar -49 from that of collar 5|.

Each of the selecting fingers '39 is provided at its upper end with upwardly projecting portions-6|, Fig. 3, having beveled upper edges which cooperate with a beveled edge rib on a locking bail 62. The locking bail 62 is pivotally mounted on suitable uprights and aspring 63 tends to depress the locking bail 62 and hold a roller 64 secured to an arm integral with looking bail 62 incontact with a lug 65 on camdrum or sleeve 45 when the cam' drum is inits arrested I position. Shortly after the cam :drum 45 is released for rotation and the lug 55 has been moved free of theroller 54 on the arm of looking bail 62, the locking bail under the action of its spring 63'is'moved about its pivot to bring its beveled rib into cooperation with the beveled portions of projections GI and consequently lock the selecting fingers 30 in the position in which they were set due to the operation of the permutation bars- 2226. 'With such a construction, the permutation bars cannot be operated during the cycle of rotation of cam'drum 45 or until locking bail 62 ismovedby lug 65 to free the beveled ribfrom the beveled portions of the projections 6| on the selecting fingers '30.

There is also mounted on cam drum 45 a cam 56, Fig. 1, which cooperates with and operates invariably for-each cycle of" rotationof cam drum 45 bell crank lever 4|lto 'cause correspondinglythe opening of its associated "contact springs 42 and 43, thereby to open the connected line circuit and transmit what is referred to as a start impulse. Consequently, at the beginning of each cycle of rotation of cam drum" 45, earn 66 operates its bell crahk'lever 40 to open contacts 42' and 43 to transmit a start impulse. Following the transmission ofthe "start impulse, cams 44 also carried by cam drum 45,

are effective successively to control the operation of the associated bell crank levers 32 in accordance withthe-position' ofthe selectable fingers A spring, one end of- 30, as previously set in response to the operation of the permutation bars 22-26, inclusive.

As cam drumv'nears the endof its cycle of rotation, stop arm53 is effective to cam collar 49 against the action of its spring 50 sufiiciently to effect its disengagement from collar 5| andarrest rotation of cam drum 45.

Also mounted on cam drum 45 is a shoulder or cam 69, Fig. 1, which cooperates with a roller 19 secured near thefree end of an arm H pivoted to end upright 35 and urged about its pivot by a spring secured between its free end and a'fixed spring post securedto the back face of upright 35, as viewed in Fig. 1'. Due to the cooperation of roller H! with the periphery of'cam 69 and particularly the recessed portion thereof, singing or chattering of the clutch comprising the collars 49 and 5| is prevented during periods of arrestment of driven portion .49 and the initial rotation of cam drum 45. Since spring 50 opposes the disengagement of collars 49' and 5|, a slight torsional bias maybe required to establish andmaintaina gap between the clutch portions after bare disengagement has occurred, it being understood that disengagement and separation of the clutch portions results solely from rotation of clutch throwout cam surface on shoulder 54 against the upper end of stop arm 53. Cooperation of roller 69 with the descend! ing slope of the recess in the periphery of cam 59 provides thev desired torsional bias.

Control of the initial rotation of cam drum 45 is important because, as previously described; its cam 56 controls bell crank lever 40 to impress upon the telegraph'line the'start impulse, the effect of which is to'set in operation the telegraph printer connected tothe telegraph line. If cam drum 45-should be permitted to be rotated far enough to initiate the start impulse before firm engagement of the clutch portions is estab-' lished, as for example, by frictional engagement of the tips of the clutch teeth on collars49 and 5|, distortion of some portion of the signal :combination to be transmitted is likely to result, due

to the subsequent slipping of the clutch portions into firm engagement and accompanyingvariation in the velocity-of cam drum 45. The immediate establishment of firm engagement between the clutch portions may be assuredby exerting, upon the driven collar 49 adrag sufficient to resist rotation due to frictional engagement between the teethof collars 49 and 5|. The desired drag is furnished by engagement of roller 1|) with the periphery of cam 69 and particularly with the sharp ascending slope of the recess therein which roller 15 encounters substantially immediately upon the tripping of stoprarm, 53- and the movement of its upper end free of-shoulder 54.

The description to this point applies specifically to the operation of the apparatus in ac-' cordance with the depression of key levers I4 and the transmission of signal impulses in accordance with such depressions through the cyclic rotation of cam drum 45. The invention also embodies apparatus for the transmission of signal impulses according to perforations in a previously p'erfo-f to control permutably the setting of a plurality of pivoted fingers 13, one individual to each possible perforationiappearing in a transverse row of perforated .tape'I I. As disclosed in Figs. 1 and 3, the fingers I3 are pivotally mounted on a shaft I5 which is supported by ears formed in vertically projecting plates I6 and I1 secured to the upper surface of base 12. Fingers I5 are normally urged in a counterclockwise direction about shaft I5 by a spring I8 (Fig. 3) which has one end secured to a depending arm I9 and its other end secured to a fixed spring support 80, there being a spring I8 individual to each of the five selecting fingers I3. Each of the fingers may be operated individually. Each of the fingers 13 also has horizontally projecting arms 8I and .82, the former of which .carries near its end a pin 83 arranged to pass through an aperture 84 individual thereto formed in horizontal plate 85, which is integral with plates I6 and TI, to sense the presence or absence of a perforation in tape I4 which, as will be later described, will be advanced step by step to bring its successive transverse rows of perforations in alignment with pins 83 individual to the arm 8| of each of the selecting fingers I3. Arm 82 of each of the-fingers I3 lies adjacent the upper end of its selecting finger 39 which, as shown in Fig 3, is notched at 85 to receive the free end of arm 82 of its selectable finger I3, depending upon whether its pin 83 has sensed a perforation in tape I4. For example, if pin 83 senses a perforation in tape I4, spring I8 rotates finger I3 suificiently to bring its arm 82 in alignment with slot 86 in the upper end of its corresponding selecting finger 30 so that, as will be described in detail later, such selecting finger 30 is permitted to move about its pivot 3I sufficiently to free its corresponding bell crank lever 32 and permit the closure of contact springs 42 and 43.

Tape I4, intermediate certain of the code perforations' therein, includes feed perforations arranged to be engaged by pins mounted in the periphery of a pin feed wheel 90, Fig. 3, which is secured to a shaft 9| journaled in plates I6 and 11. As pin wheel 90 rotates, its pins engage the feed perforations in tape I4 and thereby advance the tape past the pins 83 carried by the arms 8| of selecting fingers 13. Rotation of shaft 9| and correspondingly pin wheel 90 is achieved through a ratchet wheel 92, Fig. 5, which is also secured to shaft 9 I. Cooperating with the teeth of ratchet wheel 92 is a feed pawl 93 and a holding pawl 94 (Fig. 5) which is pivoted at 95 and which is urged into' engagement with the periphery of ratchet wheel 92 by a spring 99 which has one end secured to an arm of holding pawl 94 and its other end secured to a spring post mounted in the inner face of plate 11. Pawl 93 is rotatably secured to an arm 91 of a U-shaped member 98 pivoted on shaft I5 and having an arm 99 fastened to one end of a spring I and engageable with a post I9I to limit the travel of member 98 and consequently limit the movement of pawl 93.

As shown in Fig. 5, member 98 has an arm I02 positioned above plate 85. When this arm I02 is depressed, member 98 will be rotated about its pivot shaft I inva clockwise direction to draw pawl 93 downwardly and thus effect the rotation of ratchet wheel 92. Due to the fact that ratchet wheel 92 is secured to shaft 9I to which pin Wheel 90 is also secured, pin wheel 90 will be advanced step by step for each operation of member 98 through operation of arm I02 to advance tape 14 correspondingly. Through such operation the tape I4 may be advanced step by step through manual operation of arm I02 and member 98. 1

Member 98 also has an arm I03 to which is secured a member I04 which carries at its free end a cam roller I05 arranged to cooperate with a cam I06 integral with cam drum 45. For each rotation of cam I06 and provided roller I05 is in engagement with its periphery, member I04 will be rotated to permit rotation of member 98 under the action of its spring I00, whereupon pawl 93 is retracted to a position where its hook por-. tion engages the next succeeding tooth on ratchet wheel 92. Upon the continued rotation of cam I06, member 98 will be rotated in a clockwise direction against the action of its spring I00 and pawl 93 will be moved downwardly, as viewed in Fig. 5, to rotate ratchet wheel 92 a distance equal to the distance between adjacent teeth on its'periphery. For each such operation, pin wheel is rotated and tape 14 advanced correspondingly. Ratchet wheel 92 is, of course, held in its advanced position due to the cooperation of holding pawl 94 with its periphery.

To facilitate insertion of tape I4 preparatory to transmission in accordance with the transverse rows of perforations therein, mechanism is provided for withdrawing stepping pawl 93 and holding pawl 94 from engagement with the periphery of ratchet wheel 92. This mechanism includes a system of levers indicated generally by the reference character IIO, Fig. 5, pivotally mounted on rod III extending between plates I6 and TI. The lever system IIO has arms H2 and H3, the former of which engages stepping pawl 93 and the latter of which engages holding pawl 94 when the lever system H0 is rotated in a clockwise direction about rod I I I, as viewed in Fig. 5. Rotation of lever system IIO against the action of a spring II4, which has an end secured to an arm of lever system I I0, is effected by an arm II 5 pro-' ment with the pins 83 of the selectable fingers 13. To further facilitate insertion of tape I4 for transmission, a plate II8 of suitable transparent material is secured to the upper surface of plate 85 and has its left-hand end, as viewed in Fig. 3, curved to conform substantially with the curvature of a metal plate II9 secured also to plate 95 to direct the course of the tape I4 as it passes from the sensing position. Plate 85 has a portion of its upper surface recessed slightly to form a grooveto receive tape I4. By securing plate III! to the upper surface of plate -85, a channel is provided for the tape.

By having plate III! of transparent material, an operator in inserting the tape, can observe exactly how far the tape should be inserted to bring the first transverse row of perforations in alignment with the pins 83 for the purpose of sensing and the transmission of corresponding signal impulses. With plate II8' made from opaque material, the operator is unable to determine the exact position of insertion of tape I4 and consequently the tape is inserted to a position where the first transverse row of perforaj tions is to the right, as viewed in Fig. 3, of the pins 83. Ittherefore becomes necessaryto ad'- yance the tape step by step until the firsttransverse row of perforations is in a sensing position, when signal transmission will be commenced. However, during such preliminary advancement of the tape the cam drum 45 will be rotating and a blank signal for each cycle of rotation will be transmitted until the first transverse row of perforations in tape 14 is brought to.a sensing position. Such an arrangement results in an appreciable loss of line time. With the plate IIB of transparent material, the operator can locate :thefirst transverse row of perforationsin a sensing position when transmission may be initiated without any loss of line time and without the transmission of any blank signals.

. As disclosed in Fig. 1,.plate H8 is cut away. as indicated by the numeral I to receive a finger of the operator and thus further facilitate insertion of tape 14 when freely.

-'.Wh'en the apparatus is being 'usedfor direct keyboard transmission, it is necessary to rotate selectable fingers :13 against the. tension. of their springs 18 sufiiciently to move the free end of arm 82out of thepath of the upper end of its selectingfinger 30. correspondingly, when the apparatus is to be used ,for transmitting signals from a perforated tape such as 14, it is necessary to condition the apparatus .for' such operation. and to preclude the operation of the key levers I4. Also, because the same cam drum which transmits the signal impulses in accordance with the operation of the key levers I4 and the setting of the permutation bars is utilized for the 2 transmission of impulses inaccordance with the transverse rows of perforations in tape 14, it is necessary to selectively control the starting and stopping of the cam drum 45 when achangeis effected from one type of operation to the other type of operation. To accomplish these results, the. invention mbodies certain mechanisms which will now be described.

Each of the permutation bars 22 to 26, inclusive, is notched near its right-hand end, as

--viewed in Figs. 3 and 5, to receive thev ball end of alever I25 pivoted on a, rod I26 extending between plates 16 and 11 and fastened to one end of a spring I21which has its other end, as shown in Fig. 3, loosely secured to a bail I28 pivotally mounted on pivot pins I39 fastened to plates 16 and 11. For direct keyboard operation, levers I25, there being such a lever individual to each of the permutation bars 22-26, are in the position shown in Figs. 3 and 5 wherein spring I21, due to the loose connection of its tion bars 22-26 to any additional load when the key levers I4 are depressed. When in such position, the permutation bars 22-25 may be op;- erated freely since member I44, as later described,

is held depressed by lever I32.

pin wheel 90 will be rotated end with bail I28, does not subject the permutaaction of its spring 63 to remove its beveled rib previously described in plates 16 and 11, which .also constitutes a pivot shaft for lever system IIU. Securedto the forward end of shaft III is acollar I34 provided with an arm I35, Fig. 1,

a cam surface I36, Fig. 2, and a shoulder I31,

Figs. 1 and 2. Also secured to shaft III is a finger I38 engageablewith pins I39 and I49 ,mounted on the outer face ofplate 16 tolimit horizontal bail portion I42 and an arm I43. Bail I42 cooperates with each of the arms 19 of the selectable fingers 13 to rotate, under certain conditions, the selectable fingers 13 against the action of their spring 18 to move their arms 82 free of the-upper end of selectable fingers 30. Arm I43 of lever I32 cooperates with the surface of inclined member I44 integral with a U-shaped bail I45 pivoted'on rod 33 and having extensions I46 to which one end of springs I41 are secured, the other end being secured to a fixed spring support on guide comb 39'to hold cam rollers I48, only one of which is shown, mounted in bail I45 in contact with cams I49 and I65 also secured to cam drum 45.

Eccentric I33 cooperates with surfaces of. link I3I ,to move the link either to the right or left, as viewed in Fig. 3. When moved to the left due to the clockwise rotation of eccentric I33,

as viewed in Fig. 3, lever I32 is rotated about its pivot I26 to move selectable fingers 13 to a position where pins 83 are below plate and arm 82 is free of the upper end of its selectable finger 33 and bail I45 is'rotated against the action of its spring I41 to remove roller I48 from engagement with cam I49 and allow selecting fingers 30 to follow the movement of permutation bars 22-26; Movement of link I3I to the left, as viewed in Fig. 3, also rotates bail I28 about .its pivots in a clockwise direction and frees springs I21 of tension, so that the permutation bars 22-26 are. relieved of any effect of springs I21. I

When eccentric I33 is rotated counterclockwise, as viewed in Fig. 3, through rotation of collar I34 upon the operation of arm I35, link I 3I will be moved to the right, rotating bail I28 in a counterclockwise direction and, through springs 7, I21 and levers I 25, move permutation bars 22-26 to the left, as viewed in Fig. 3, or to the allmarking position. The specified movementof link I3I causes lever I32 to be rotated in a clockwise direction to move bail I42 free of arm 19 of each of the selectable fingers 13 and to move arm, I43 out of engagement with projection I44 of bail I45 to allow spring I41 to rotatebail I45 to bring roller I48 into engagement with cam I49 and move the arm 82 of each of the selectable ing finger 30. Due to the rotation of lever I32,

an -extensionof arm I43 engages a surface of locking bail 62 to rotate the bail against the free of the beveled ends 6| of selecting fingers 3D and roller 64 free of lug 65.

' The apparatus, when used for direct keyboard operation, is arranged such that the permutation bars 22-26 remain in their set position until a change is-occasioned through the-depression of another key lever I4. Consequently, the selecting fingers 30 remain in their set position, either marking or spacing position. When eccentric I33 is rotated counterclockwise, as viewed in Fig. 3, to permit elevation of bail I45, the bail engagessurface I50 near the upper end of each of the selecting fingers 39 and cams each of the selecting fingers counterclockwise to a position where its hook 38 lies in the path of the horizontal arm of its associated bell crank leverv32, in which position the contacts 42 and 43 are maintained open, except for the contacts individual to bell crank lever 40, which is controlled by cam 66.

When conditioning the apparatus for tape operation, it is essential that the key levers I4 be locked against operation. To achieve this result, bar 2I is movable to the left against the tension of a spring II, which has one end secured to a projection on the lower edge of bar 2| and the other end secured to a fixed spring post on base I2, upon movement of a lever I52 which has one end in engagement with the right-hand end of.

bar 2| and the other end engageable by a cam I36 formed in collar I34. When collar I34 is rotated to condition the apparatus for tape operation, cam I36 engages the upper arm of lever I52 to rotate the lever clockwise about its pivot and move bar 2i against the action of its spring I5I to the left, as viewed in Fig. 2, whereupon a projection on the upper edge of bar 2I is moved into the path of each of the key levers I4. Under such conditions, none of the key levers I4 can be depressed, which insures against operation of the key levers I4 during tape transmission, for if a key lever I4 was depressed during tape transmission and provided the code bars 2226 are operated, the signals intended to be transmitted in accordance with the perforations in the tape I4 would be mutilated.

With the apparatus in the position just described, operation from the perforated tape I4 may be initiated. Initiation of tape operation is effected through the withdrawal of stop arm 53 from the path of shoulder 54 of collar 49 to permit spring 50 to move collar 49 into engagement with collar 5I, which rotates continuously. To achieve this result, T-shaped lever 56 is arranged to be operated by rod I53, which is slidably mounted in suitable supports and which carries near its forward end, as viewed in Fig. 1, adjustable nuts I54 engageable by a projection I55 formed in the vertical edge of bar I56 which is pivoted on a shoulder screw I5I secured to the upper face of base I2 and which is rotatable by a lever I58. Lever I58 has two positions, identified as a stop position and a start position. When in its stop position, projection I55 of bar I56 allows a spring I60 (Fig. 2), which has one end secured to a spring post and the other end secured to an arm I6I (Fig. 4), pivoted on a rod I62 having a vertically extending arm I63, to move through arm I63 and nuts I54, rod I53 to a position where it is out of engagement with T-lever 56. When lever I58 is rotated to its start position, bar I56, through its projection I55, movesrod I53 forward, as viewed in Fig. 1, against the tension of spring I60, whereupon T-lever 56 is operated to move stop arm 53 out of the path of lug 54 formed on collar 49 to permit spring 50 to move collar 49 into engagement with continuously rotating collar 5I. Bar I56 is held in its two positions by a detent bar I64 which is mounted on the upper surface of base I2.

The free end of bar I56 is adapted to engage shoulder I3? formed in the periphery of collar I34 when lever I58 is in its start position, wherein cam drum 45 rotates continuously. When bar I56 is so positioned, arm I35 and collar I34 cannot be rotated to change the apparatus from tape operation to direct keyboard operation. Consequently, in order to permit a change from tape operation to direct keyboard operation,

corresponding selecting finger 30'.

is necessary to rotate lever I58 to its stop position wherein rod 153 will be restored by spring I60. to a position'out of engagement with T-lever 56, whereupon stop arm 53 is rotated about-its pivot to a position where its upper end lies in the path of stop lug 54 to move collar 49 out of engagement with collar '51. at the completion of a signaling cycle.

When lever I58 is rotatedto' its start position, cam drum 45 rotates continuously. For each cycle of rotation of cam drum 45, cam 66 operates bell crank lever 40 to operate its contact springs 42 and 43 .to transmit to'the connected line a start impulse, and cams I49 and I63, through rollers I48, permit and operate bail I45. During the stop impulse, bail. I45 is moved by its spring 141 to a positionwhere the selecting fingers 30 are moved to a position where their hook 38lies in the path of the horizontal arm of bell crank lever 32 and arm 82 of selectable fingers I3 is in alignment with the upper end of its corresponding selecting finger 30. As cam I49 rotates, and during thetransmission of the start impulse, bail I45 is moved downwardly to permit rotation of selecting fingers I3 by the action of their spring I8 to a position where the pins 83 sense the respective signal areas of tape 14.111

the up position of bail 145$ arm 82 of sensing fingers I3 are in line with associated projections on lock levers 30, while in the down position of about pivot 1.5 to position its arm 82 in alignment with-slot 86 formed in the upper end of its 7 In its other position or the position wherein pin 83 encounters an unperforated area of tape I4, arm 82 lies in the path of the upper-end of its corresponding selecting finger 30. I

As bail I45 continues its do -ward movement and before the end of the start impulse, selectingfingers 38 are free to be moved by their individual spring I2I-, as determined by th position of arm 82 ofits selectable finger 13. If arm 82- is in alignment with notch 86, then its corresponding selecting-finger 30, by the action of its spring I21, is moved to a position where hook 38 is free ofthe horizontal arm of its corresponding'bell crank lever 32. Now, as its corresponding cam 44 becomes effective, contact springs 42 Howevenif arm 82 is held in its upper position,

its end engages the upper end of its corresponding selecting finger 30 and does not permit moveinent of its selecting-finger 30 sufiic'iently to free hook 38 from the horizontal arm of bell crank lever 32. Consequently, its corresponding contact springs 42 and 43 will not be closed when the recess of its cam 44 is aligned with the lug of its be'll crank 32.

For each rotation of dam drum 4 5, cam I06 rotates arm I84 through roller I05 to move stepping pawl 93 to engage the next succeeding tooth, Fig. 5, and rotat ratchet wheel 92 a distance equal to the space between adjacent teeth and correspondingly rotate shaft 9I and pin wheel 90 to advance tape I4 to present the next transverse row of perforations in alignment with pins 83. Such advancement, however, does-not occur unprojection I38 contacts stop lug I39.

-' til bail I45 has been moved to its extreme upper- .tri'cal contacts l18which are normally open but most position by the action of spring I41 as per- -mittedby cam I49, wherein pin 83 of each of the selectable fingers 13 is positioned free of tape 14,

as shown in Fig. 3.

If it is desired to advance the tape 14 step by step under manual control, lever I58 is operated to its stop position wherein arm 53 will be positioned in alignment with stop lug 54 on collar 49. Through the operation of arm I63, rod I53 is moved to rotate T-lever 56 to move stop arm 53 free of stop lug 54. If arm I63 is held in such position, cam drum 45 will rotate continuously and transmission will continue from perforated tape 14. However, if it is restored immediately after its operation, cam drum 45 will make but a single cycle. Such operation can, of course, be continued by the momentary operation of arm I63. In this way the tape 14 may be advanced slowly to bring a. particular area in alignment with the sensing pins 83 and its exact position determined due to the transparent plate II8.

If, when the arm I35 is in the tape position and the lever I58 is in the start position it is keyboard operation, lever I58 first must be rotated to its stop position wherein the free end of bar I56 is moved free of shoulder I31 of collar I34, when collar I34, through arm I35, may be rotated to its direct keyboard position, wherein Selecting fingers 13 are now in a position where pins 83 are below plate 85-, and stepping pawl 93 is held against movement even though cam I66 rotates for each key lever depression. Key levers I4 are free for operation. because lever I52 is free to be moved to the position shown in Fig. 2 by the action of spring. II which moves bar 2| to a position whereits projections lie out of the path of key levers l4.

The keyboard transmitter and the tape 'trans mitter previously described are associated with vand operatively connected to a receiving printer indicated generally by the reference character I 19 which maybe of the type and form disclosed in copending application Serial No. 77,796 of Albert H. Reiber and copending application Serial .No. 204,038 of Carl A. Levin, wherein description will be found of apparatus for performing selective functions.

which serve, when closed, to short circuit contact springs 42 and 43 and thus preclude the transmission of signal impulses to the connected line circuit upon the rotation of cam drum 45.

character I1I, which embody a particular function bar I12. The function bars I1I respond to a particular setting of the code discs of the receiving printer disclosed in the cited copending applications and, when selected, function to perform its particular operation.

A function lever I13 pivoted at I14 is biased in clockwise direction by a tension spring I and normally occupies the solid line position shown in i extension which cooperates with a pair of elec- Lever I13 has a contact operating Included with such functions is- .the function of operating a pair of contacts applications.

on pivot rod I 5. thereto adjacent to the point at which it is pivotally mounted a clamp I83 which includes reverted .fingers I 84 fitted over oneedgeof key lever I82 clamp I83.

7 I13, key lever I82 is depressed. .This causes arm I81 of clamp I83 to be rocked in counterclockwise which, when: closed, establish a short circuit for contacts 42 and 43 of the transmitter. .When

contacts 'I16are closed, transmission of impulses operate with a latch lug I11 on function bar I13.

When function lever I12 is selected and operated, it will be held in such positionby latchingv lug -I11.v Function lever I 13 falls in against the left- .hand side of function bar I12 and holds it from returning to its extreme clockwise position at the end of the function testing 1 operation, as

fully described in the-aforementioned copending Upon the, rearward reciprocation of function bar I12, lever I13 will berotated to the dotted line positionshown in Fig. l and thus .cause the closure of contacts I16. and the establishment of a short circuit for contacts 42 and 43. A bracket I18 suitably secured to a bracket mounted on the base I2 supports a latch lever I19 which is biased in counterclockwise direction by tension spring I80. At its right-hand end, as

viewed in Fig. 4, lever I19 is step-cut to provide a shoulder for engaging lever I13 near its right.- .hand end, as viewed in Fig. l, to block the return .of lever I13 and thus the opening I16.

lever which initiates the generation of a signal combination that willbe hereinafter specifically identified, is indicat-edin Fig. 4 by referencenumeral I82 which, like the key levers I4, is pivoted Key lever I82. has secured and clamping screw I85 engaging the other edge ,of the same key lever and drawing reverted fingers I84 firmly into engagement with the firstvmentioned edge.

Clamp I83 has secured thereto or integral therewith an arm I86 which ext'ends rearwardly of base I2 and arm I86 has avertically directed portion I81 which emerges from'base I2 to an aperture at the rear thereof and terminates beneath lever I19 adjacent tothe downwardly sloping portion I8I. thereof.

When transmitter shunting contacts I16 are closed, lever I13 is latched in its extreme counterclockwise position. When lever I 13 is in this position, its left-hand end, as viewed inFig. 4, rocks-downwardly into a position of substantial engagement with the upper end of frame I81 of When it is desired to unlatch function lever qdirection, as viewed in Fig. 4, whereupon downwardly sloping portion I8I of lever I13 is cammed upwardly sufficiently to disengage the shoulder formed in the right-hand end of lever I19 from .lever I 13 andallow the latter lever to be restored to its solid line position by the action of spring I15. i v

Although the clamp I83 maybe secured to any of the key levers I4, it has been found particularly satisfactory to secure it to the key'lever which initiatesthe generation of the. unshift or letters signal combination. According to: a widely used of contacts system of printing telegraph signal transmission,

each signal combination representing a character or a function consists of a permutation code combination of marking and. spacing impulses preand represent the stop condition. When the transmitter is operated, these contacts are open, thereby creating a spacing condition of the line which is indicative of the start impulse. The impulses for the particular signal combination are then generated successively and after the last code impulse has been generated the stop impulse contacts 42 and 43 are closed, whereupon the stop impulse is impressed upon the line. The start impulse sets in operation the receiving selector mechanism of the printing telegraph receiving unit corresponding to I10 connected to the line, and the stop impulse of marking nature arrests the receiving selector mechanism.

When contacts I18 are closed and function lever I13 is latched, a closed line condition is established so that even though the cam drum 45 rotates, impulses will not be applied to the line. When key lever I82 is operated, it will release the cam drum 45 for a cycle of operation. Until contact springs I16 are opened, the code impulses will not be applied to the line but after the contacts are opened, the impulses will be transmitted. The apparatus is then in a condition for transmission of impulses either from the keyboard transmitter or from the tape transmitter.

Secured to the upper surface of base I2 is a bracket I88 in which there is pivotally mounted a U-shaped member provided with arms I89 and I90 to the former of which is secured a rod I9I adjustable in length by means of an adjusting nut and. having its lower end, as viewed in Fig. 4, looped to engage the loop in rod I53 which, as previously described, serves to operate, under certain conditions, 'T-shaped lever 56 and to remove stop arm 53 from the path of stop lug 54 and cause the rotation of cam drum 45. To arm I90 there is adjustably attached at its free end members I92 and I93 which extend obliquely upwardly and substantially vertically, respectively. Arm I92 lies beneath lever I19 and is adjusted to engage sloping portion I8I of lever I19 upon the operation of its arm I90, which results upon the movement of rod I9I through rod I53 which may be operated by lever I58 and arm I63.

When the apparatus is being operated for the transmission of a message from perforated tape 14 and should the operator at the distant receiving printer desire to reverse the direction of transmission, such operator operates what is customarily referred to as the send-receive break key. Operation of the send-receive break key transmits signal combinations for the operation of function lever I13 to preclude further transmission from the receiving printer with which the contacts I16 are associated. When the function bar I12 is operated to operate function'lever I13, a projection thereon engages the upper end of member I93 to rock arms I89 and I98 in a clockwise direction, as viewed in Fig. 4. If the transmitting apparatus is positioned for tape transmission, rod I53 will be in its extreme left-hand position, as viewed in Fig. 4, and stop arm 53 will be held free of stop lug '4 and cam drum 45 will be rotated continuously. When arm I89 is rocked clockwise, as just described, rod I53,

through rod I9I,'will be moved to the right, as viewed in Fig. l, whereupon lever I58 will be rocked about its pivot from the startto the stop position and T-lever 56 will be restored to its normal position to permit stop arm 53 to be moved to a position where its upper end lies in the path of stop lug 54. When engagement between stop arm 53 and stop lug 54 occurs, collar 49 will be moved along shaft 46 out of engagement with collar 5| and cam drum 45 will be arrested.

When the apparatus is in the condition just described, the operator who operated the sendreceive break key may transmit a message to the receiving printer wherein its transmitter was previously being operated for the transmission of a message. Conditioning of the apparatus for resumption of transmission may be accomplished through the depression of key lever I82 if transmission was from the keyboard, or by rocking lever I58 if transmission was from tape 14.

Cessation of transmission from selectable fingers I3 occurs after the last transverse row of code perforations in tape 14 has been presented to the pins on the arm 8| of selectable fingers 13. This condition is evidenced by or indicative of the blank or all-spacing signal. For such a condition there will be obstruction to the movement of all of the selectable fingers 13. An all-blank signal will be transmitted. The receiving printer will respond to such signal in the manner identical with that previously described for the transmission of the send-receive-break signal, except that its operation will be evidenced locally rather than from a distant point.

In response to the all-spacing signal, the selector mechanism of the receiving printer is set to select function bar I12 and through it the operation of function bar I13. Lever I89 is thus operated and through its operation rod I9I is moved backward,'as viewed in Fig. 1, whereupon rod I53 is correspondingly actuated to permit stop arm 53 to rotate about its pivot to bring its upper free end in the path of'stop lug 54 on collar 49. As previously described, the cooperation between the recited arm of stop arm 53 with stop lug 54 causes disengagement between collars 49 and 5I and the arrestment of cam drum 45. Upon the arrestment of cam drum 45, further signals will not be transmitted unless additional tape is inserted in the tape transmitter or the apparatus, is conditioned for keyboard transmission and the key levers I1 subsequently operated.

The space bar connected to levers I8 may also be operated to move rod I53 to the left, as viewed in Fig. 4, and effect continuous rotation of cam drum 45. Under such circumstances the signal combination identified with the space bar will be transmitted continuously.

While the apparatus has been disclosed as applied to' a particular type of apparatus, it is manifest that the invention is not limited to such specific apparatus but may be embodied in other forms of apparatus Without departing from its spirit.

What is claimed is:

l. A telegraph transmitter including a plurality of contacts, permutation bars, key levers for operating said bars in varying combinations, elements controlled by said permutation bars to control the operation of said contacts, means for sensing signal indicia in a strip, members controlled by said sensing means for controlling permutably the operation of said contacts, manually operated means, and means operated by said ear/po manually operated means for moving said members during key lever operation to a position unresponsive to signal indicia in said strip.

2. A telegraph transmitter including a plurality of contacts, permutation bars, key levers for operating said bars in varying combinations, elements controlled by said permutation bars to control the operation of said contacts, means for Sensing signal indicia in a strip, members controlled by said sensing means for controlling permutably the operation of said elements, manually operated means, and means operated by said manually operated means for rotating said members during key lever operation to a position inoperative on said elements.

3. A telegraph transmitter including a plurality of contacts, permutation bars, key levers for operating said bars in varying combinations, elements controlled by said permutation bars to control the operation of said contacts, means for sensing signal indicia in a strip, members controlled by said sensing means for controlling permutably the operation of said elements, manually operated means, and means operated by said manually operated means for rotating said members to a position inoperative on said elements and for allowing said permutation bars'to' assume an all-spacing position.

l. A telegraph transmitter including a plunal indicia in a strip, means operated by said sensing means for setting said elements correspondingly, a support for said strip during sensing of the indicia, and a transparent member secured to said support for locating said strip on said support and having its end curved to guide the leading end of said strip and to render said sensing means visible whereby insertion of the strip for beginning of sensing operation is expeited. 1

5. A telegraph transmitter including a plurality of contacts, permutation bars, key levers for opera-ting said permutation bars in varying combinations, elements controlled by said permutation bars to control the operation of said contacts, a rotary cam drum for operating said contacts successively in accordance with the setting of said elements, means for arresting said cam drum in normal position, means for sensing signal indicia binations, elements controlled by'said permutation bars to control the operation of saidcontacts, a rotary cam drum for operating said contacts successively in accordance with the setting of said elements, means for arresting said cam drum in normal position, means for sensing signal indicia in a strip, means controlled by said sensing means for controlling permutably the operation of said contacts, means for selectively controlling the effectiveness of said sensing ating said cam drum releasing means whereby said cam drum rotates continuously, and means for returning said arresting means to it normal. position to stop said drum when an unperforated area of the strip is presented to the sensing means.

7. A telegraph transmitter including a 'plu'-' rality of contacts, permutation bars, key levers for operating said permutation bars in varying combinations, elements controlled by said per-' mutationbars to control the operation of said contacts; a rotary cam drum for operating said contacts successively in accordance with the setting of said elements, means for arresting said cam drum in normal position, means for sensing signal indicia in a strip, means controlled by said sensing means for controlling permutably the position of said elements, means for selectively controlling the efiectiveness of said sensing means on said control means, and means operated cyclically for moving all of said elements to a spacing position and moving said sensing means to a non-sensing position.

v 8. A telegraph transmitter including a plurality of contacts, permutation bars, key levers for operating said permutation bars in fvarying combinations, elements controlled by said permutation bars to control the operation of said contacts, a rotary cam drum for operating said contacts successively in accordance with the setting of said elements, means for rotating said cam drum either intermittently or continuously, means for controlling the intermittent'or continuous rotation of the cam drum for keyboard and strip control respectively, means for sensing signal indicia in a strip, means controlled by said sensing means for controlling permutably the operation of said elements and therethrough the permuted operation of said contacts, and means for selectively controlling the effectiveness of said sensing means and for moving said permutation bars and said elements to an all-marking position preparatory to transmission from the indicia in said strip.

9. A telegraph transmitter including a plurality of contacts, permutation bars, key levers for operating said permutation bars in varying combinations, elements controlled by said permutation bars to control the operation of said contacts, a rotary cam drum for operating said contacts successively in accordance with the setting of said elements, means for rotating said cam drum either intermittently or continuously, means for controlling the intermittent or continuous rotation of the cam drum, means for sensing signal indicia in a strip, means controlled by said sensing means for, controlling permutably the operation of said elements and therethrough the permuted operation of said contacts, means for selectively controlling the effectiveness of said sensing means and for moving said permutation bars and said elements to an all-marking posimeans on said control means, means operated after said sensing means has been conditioned for operation by the indicia on said strip for opertion preparatory to transmission from the indicia in said strip, and means operated subsequently through the operation of said last recited means for establishing a condition to effmt the continuous rotation of said cam drum.

10. A telegraph transmitterincluding azplurality of contacts, permutation bars, key levers for operating said permutation bars "in varying combinations, elements controlled by said permutation bars to control theop'eration of said contacts, a rotary cam drum for operating said contacts successively in accordance with the setting of said elements, means for arresting said cam drum in. normalnposition, means operated by said keylevers for-operating said cam drum arresting means whereby said cam drum makes a complete rotation for each key lever operation,

means for sensing signal indicia in a strip, members controlled by the sensing means cooperating with its corresponding'element for controlling the i permutated operation of said contacts, means for maintaining said cam drum arresting means operated during operation from said strip whereby -said cam drum rotates continuouslyga cam on said cam drum, and means operated by said cam foroperating said strip step by step to bring successive indicia to a sensing position .with respect to saidsensing means.

11. A telegraph transmitter including a plurality of contacts, permutation bars, key levers "-foroperating said permutation bars in varying combinations, elements controlled by said permutation'bars to control the operation ofsaid contacts, a rotary cam drum for operating said contacts successively in accordance with the setting of said elements, means for arresting. said cam drumin normal position, means operated by said key-levers for. operating said cam drum arresting *means'whereby saidcam drum makes a complete rotation for-each key lever operation, means for its corresponding element for controlling the per- --sensing-signal indicia in a strip, members .con-

trolled by the sensing means cooperating with mutated operation of said contacts, means for maintaining said cam drum arresting means operated during operation fromv said strip whereby said cam drum rotates continuously, a cam on said cam drum, means operated by said cam for operating said strip step by step to bring successive indicia to asensing position, with respect to said sensing means, and means operated by said cam drum for disassociating said members from said elements whereby said strip advancing means -may be effective for the advancement of said strip.

- 12.- A telegraph transmitter including a plurality of contacts, permutation bars, key levers for operating said bars in varying combinations, -elements controlled by said permutation bars to control theoperation of said contacts, means for sensing signal indicia in a tape, members controlled by said sensing means for controlling permutably the operation of said contacts, and

means for rendering said members operative from thesensing means and the tape and for blocking ,theoperation of said key levers.

-13. A telegraph transmitter including a plurality of contacts,. permutation .bars, key levers for operating. said bars in varying combinations, elements. controlled by. said permutation bars to control the operation of said contacts, means for sensing signal indicia in a tape, members controlled by 1 said sensing means for controlling permutably the operation of said contacts, a

lever for positioning said members to exercise control over said contacts, and means operated upon a predetermined operation of saidlever for blocking the operation of said key levers.

14. Atelegraph transmitter including a plurality of contacts,-permutation bars, key levers forcperating said bars in varying combinations,

. elements controlled by said permutation bars to .contral the operation of .said contacts, means for sensing signal indicia in a tape, members controlled by said. sensing means for control- 5. A telesrap etransm e inclusi i v l rality of contacts, elements to control the operation of said contacts, a rotary cam drum for 10 ,ance with the setting of said elements, means t n n to m ve, a d; element t con i erat n a contac su ce s v in a cor contacts for operation, and means controlled r i pe o a e e i n re ing o blc k nst operation of said elementswherebysaid contacts are operated by said cam drum in accordance th p r o ation nisa ta 16.;A ,telegraphtransmitter including a plurality of contacts, el ements to control the opera o p i a icont qt ra ta ca dru for operating said; contacts successively in accordancewith the, setting of saidelements, a spring individuaL to cachet-said elements tending to move the elements to a marking;position, and

means for sensing a ,perforated tape and controlling the-position of saidelements to a marking-or spacingposition.whereby said contacts are operated by said camdrum in accordance with the perforationsin said tape.

, l7. Atelegraph transmitter including a plurality; ofcontacts, elements; to control the operation of said contacts, a rotary camdrum for operating said contacts successively;in.;accordance with thesetting of; said elements, a spring I individual toeach of said elements tending to eth e emen sio. a markin os i means for sensing a pertorated tapep andtmeans on i ta rum: ;i .m Yin sa dle a spacing position and thereafter, conditioning said elements to assume positions-determined by the sensing means whereby said contacts maybe op- ,erated by. said card drum inpaccordance with t e rrat c s i sa t .8, 'In a-telegraph transmitter including a pin.

rality of contacts permutation bars, key levers for operating; said .permutation bars in varying comb nat o e emen ont olle said p tation bars tocontrol the. operation of said contacts, a rotary cam drum foroperating said contacts successively in accordance with the setting of, said elementa means for arresting said cam drum in, normal position, .meansoperated by said keylevers-ior operating said cam drum arrest ng meanswherebysaid cam drum makes a complete, rotation foreach key lever operation,

I meansfon sensing signal indicia in astrip, members,contr,olled by the .sensingmeans cooperating with itscorresponding element for v controlling the permuted operation of said contacts, means for-maintaining said cam drum arresting means operated during operation-fromsaid strip independently ,of {the condition of said strip whereby saidcam druin rotates -continuously,- a cam on said cam drum, Tmeansoperated. by said cam for operating said-strip step by step 'to bring success ve indicia .to alsensi ig position with respect to said sensing means and means operated by said cam drumflfor disassociating said members from said elements wherebyfsaid strip advancing means maybe efiective i or the advancement of said strip.

Ross 

